Review: Oxford's Foals, now ten years old and some seven years on from their debut, have pulled the neat trick of elevating themselves to dizzy heights without essentially compromising their kinetic mixture of art-driven experimentation and widescreen melodic grandstanding. Yet 'What Went Down', their fourth salvo thus far, shows a band newly reinvigorated, and somehow managing to be both heavier and more danceable in turn. As angry and inventive as ever, the howls of mainman Yannis Philippakis have lost none of their cathartic charge, the chime of their guitars remains as seductive, yet so vibrant and vivacious is this collection of songs that their elevation to festival headliner status seems a foregone conclusion.